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PDF A3940KLW Data sheet ( Hoja de datos )
| Número de pieza | A3940KLW | |
| Descripción | FULL-BRIDGE POWER MOSFET CONTROLLER | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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3940
FULL-BRIDGE POWER MOSFET CONTROLLER
— For Automotive Applications
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A3940KLP
(TSSOP with exposed
thermal pad)
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A3940KLW
(SOIC)
Approx. 2X actual size.
The A3940KLP and A3940KLW are designed specifically for
automotive applications that require high-power motors. Each provides
four high-current gate drive outputs capable of driving a wide range of
n-channel power MOSFETs in a full-bridge configuration.
Bootstrap capacitors are utilized to provide the above-battery
supply voltage required for n-channel FETs. An internal charge pump
for the high side allows for dc (100% duty cycle) operation of the
bridge.
Protection features include supply under/overvoltage, thermal
shutdown, and motor lead short-to-battery and short-to-ground fault
notification, and a programmable dead-time adjustment for cross-
conduction prevention. The overvoltage trip point is user adjustable.
The A3940 is supplied in a choice of two power packages, a 28-
lead TSSOP with an exposed thermal pad (suffix LP), and a 28-lead
wide-body SOIC (suffix LW).
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage Range, VBB,
VDRAIN, CP1 .......... -0.6 V to +40 V
Output Voltage Ranges,
LSS .............................. -2 V to +6.5 V
GHA/GHB, VGHX ........ -2 V to +55 V
SA/SB, VSX .................. -2 V to +45 V
GLA/GLB, VGLX .......... -2 V to +16 V
CA/CB, VCX .............. -0.6 V to +55 V
CP2,VCP, VIN .......... -0.6 V to +52 V
Logic Input/Output Voltage Range
VIN, VOUT ................... -0.3 V to +6.5 V
Operating Temperature Range,
TA ........................... -40°C to +135°C
Junction Temperature, TJ ......... +150°C*
Storage Temperature Range,
TS ........................... -55°C to +150°C
* Fault conditions that produce excessive
junction temperature will activate device
thermal shutdown circuitry. These conditions
can be tolerated, but should be avoided.
FEATURES
! Drives wide range of n-channel MOSFETs
! Charge pump to boost gate drive at low-battery-input conditions
! Bootstrapped gate drive with charge pump for 100% duty cycle
! Synchronous rectification
! Fault diagnostic output
! Adjustable dead-time cross-conduction protection
! Motor lead short-to-battery and short-to-ground protection
! Undervoltage/overvoltage protection
! -40°C to +150°C, TJ operation
! Thermal shutdown
Always order by complete part number, e.g., A3940KLP .
1 page  
3940
FULL-BRIDGE POWER
MOSFET CONTROLLER
ELECTRICAL CHARACTERISTICS: unless otherwise noted at TA = -40°C to +135°C, TJ = -40°C to +150°C,
VIN ≤ VBB = 7 V to 40 V, Cp = 0.47 µF, Cr = 1 µF, CREG5 = 0.1 µF, CREG13 = 10 µF, CBOOT = 0.1 µF, PWM = 22.5 kHz
square wave.
Limits
Characteristics
Symbol Conditions
Min Typ Max Units
Control Logic
Logic Input Voltage
Logic Input Current
VIN(1)
VIN(1)
VIN(0)
IIN(1)
IIN(0)
IIN(0)
HIGH level input (Logic 1), except RESET.
HIGH level input (Logic 1) for RESET
LOW level input (Logic 0)
VIN = 2.0 V
VIN = 0.8 V, except RESET(0)
VIN = 0.8 V, RESET(0)
Gate Drives, GHx, GLx ( internal SOURCE or upper switch stages)
Output High Voltage
Source Current (pulsed)
Source ON Resistance
Source Load Rise Time
VDSL(H)
IxU
rSDU(on)
tr
GHx: IxU = -10 mA, Vsx = 0
GLx: IxU = -10 mA, Vlss = 0
VSDU = 10 V, TJ = 25°C
VSDU = 10 V, TJ = 135°C
IxU = -150 mA, TJ = 25°C
IxU = -150 mA, TJ = 135°C
Measure VDSL, 20% to 80%, CL = 3300 pF
Gate Drives, GHx, GLx ( internal SINK or lower switch stages)
Output Low Voltage
Sink Current (pulsed)
Sink ON Resistance
Sink Load Fall Time
VDSL(L)
IxL
rDSL(on)
tf
GHx: IxL = 10 mA, Vsx = 0
GLx: IxL = 10 mA, Vlss = 0
VDSL = 10 V, TJ = 25°C
VDSL = 10 V, TJ = 135°C
IxL = +150 mA, TJ = 25°C
IxL = +150 mA, TJ = 135°C
Measure VDSL, 80% to 20%, CL = 3300 pF
Gate Drives, GHx, GLx (General)
Propagation Delay
Output Skew Time
Dead Time
(Shoot-Through Prevention)
Between GHx, GLx transitions
of same phase
tpd Logic input to unloaded GHx, GLx
tsk(o) Grouped by rising or falling edge
tdead LONG = 0, RDEAD = 12.1 kΩ (IDEAD = 167 µA)
LONG = 0, RDEAD = 499 kΩ (IDEAD = 4 µA)
LONG = 1, RDEAD = 12.1 kΩ (IDEAD = 167 µA)
LONG = 1, RDEAD = 499 kΩ (IDEAD = 4 µA)
2.0 –
–
V
2.2 –
–
V
– – 0.8 V
– 40 100 µA
– 16 40 µA
– – 1.0 µA
VREG13 - 2.2 –
VREG13 - 0.2 –
– 700
400 –
4.0 –
7.0 –
– 90
VREG13
VREG13
–
–
13
23
–
V
V
mA
mA
Ω
Ω
ns
– – 150
– – 150
– 800 –
550 –
–
1.8 – 6.0
3.0 – 7.5
– 70 –
mV
mV
mA
mA
Ω
Ω
ns
– – 225 ns
– – 50 ns
0.3 – – µs
– – 11.0 µs
8.3 – – µs
– – 345 µs
NOTES: Typical Data is for design information only.
Negative current is defined as coming out of (sourcing) the specified device terminal.
For GHX: VSDU = VCX – VGHX, VDSL = VGHX – VSX, VDSL(H) = VCX – VSDU – VSX.
For GLX: VSDU = VREG – VGLX, VDSL = VGLX – VLSS, VDSL(H) = VREG – VSDU – VLSS.
Continued next page …
www.allegromicro.com
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3940
FULL-BRIDGE POWER
MOSFET CONTROLLER
A3940KLP (TSSOP)
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Lead spacing tolerance is non-cumulative.
3. Supplied in standard sticks/tubes of 50 devices or add “TR” to part number for tape and reel.
www.allegromicro.com
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet A3940KLW.PDF ] | |
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